Of one-half



(No Model.)

E. PRUITT.

I SAFETY ATTACHMENT FOR GAS BURNERS. No. 364,729. Patented June 14, 1887.

UNITED STATES ll ATENT OFFICE.

EUGENE R. PRUITT, OF BALTIMORE, MARYLAND,ASSIGNOR OF ONE-HALF TO CLARENCE D. PARKER, OF SAME PLACE.

SAFETY ATTACHMENT FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 364,729, dated June 14, 1887. Application filed March 15, 1887. Serial No. 230,937. (No model.)

To all whom it may concern:

Be it known that l, EUGENE R. PRUITT, of the city of Baltimore'and State of Maryland, have invented certain new and useful Improvements in Safety Attachments to Gas or other Burners, of which the following is a specification.

The object of. my invention is to providea safe and ready means for cutting off the sup- 1: ply of gas to the burner when the light has been extinguished.

The accompanying drawings illustrate the invention, of which- Figure 1 is a view of a jointed gas-pipe with burner, and showing a side view of my safety attachment in place. Fig. 2 is a top or plan view of the same; Fig. 3, a top or plan View of safety attachment, showing the burner in section taken on line 1 1 of Fig. 1; Fig-4,21 top or plan View of the same,'with the burner shown in section on line 2 2 of Fig. 1; Fig. 5, asectional view. of the drum, also showing the catch-lever in the position when the gas is first turned on and before the head of the drum has been thrown out by expansion. This figure also shows a pipe or tube running through the drum, which slips over the gas-pipe. Fig. 6 is a view of the same, as shown in Fig. 5,with the head of the drum thrown out and the catch-lever held by the lug in the center of the drum-head.

as it appears when the gas is turned on, the catch-lever thrown off of the lug on the edge of the drum-head and caught by the one in the center.

Let A, Figs. 1 and 2, represent an ordinary gas-pipe, B the burner, and G the ordinary cock by which the gas is turned on and off.

D is a drum, made of tin or other suitable o material,and air-tight. Thisdrnm maybe filled with any aeriform fluid which expands by the action of heat and contracts in' cooling. The

drum may be soldered to the gaspipe or made Fig. 7 is a view of the gascock' One of the heads of the drum, preferably the upper one, is provided with two lugs or projections, d and d". This head of the drum is normally concaved, similar to that of the 5 ordinary tin can containing provisions, and the one near the center (1 is placed a little back of a line drawn through the center of the burner and the center of the drum. Attached to the end of the plug of the cock 0 is 6 the catch-lever E. A good way to arrange this lever is to perforateit with a square hole, corresponding to the square on the end of the plug, and when slipped over this square it is tightened in placeby the nutscrewed on the end 6 of the plug. The arms of this lever project in both directions from the plug,the short arm toward the burner and thelong arm over the top of the drumthat is to say,it will occupy this position when the gas is turned on, and when turned off the position will be such as shown in dotted lines, Fig. 4. It will be'seen by this that when the cock is turned to let on the gas the catch-lever E turns with it until it passes over and is caught by the projection d on the drum. The short arm of the lever is connected with a spring, 6, Fig. 1, which exerts its tension in a directionopposite to that which opens the cock-that is to say, whenleft free to act, the spring will turn the plug to I shut off the gas. This spring may be arranged upon cither arm of the lever; as shown in Fig. 1, it actuates the short armby having one end attached thereto, while the spring is coiled around the burner and with its other's end secured to the plate 6 A tube, F, is soldered to a suitable portion of the drum so as to communicate with the interior thereof, and the other end of this tube terminates in a sphere or ball, f,which may be c placed in any suitable position to be heated by the flame from the burner. The plate 6 is perforated to slip over the burner, and also has another perforation, through which the tube passes. It will thus be seen that the de- 5 vice may readily be used for any burner. The'drnm is first slipped over the gas-pipe,the catch-lever placed upon and secured to the end of the valve-plug, the ball f unscrewed from the end of the tube, and the plate 6 slipped rco which enters a hole in the end of the catchlever E, the ball f is then replaced, and the device is ready for work.

The operation of the device is as follows: When the gas is ready to be turned on, the catch-lever E occupies the position shown in dotted lines, Fig. l. As the plug is turned to open the cock it passes over and drops behind the lugd and is held by that lug against the tension of the spring 0. The gas, being lighted, heats the ballf,whieh communicates its heat through the tube F to the fluid within the drum, causing it to expand and force out the drum-head, as shown in Fig.6. As the head is forced out it lifts the catch-lever above the line of the lug dflwhen it is immediately caught and held by the lug d, located near the center of the drum-head, and keeps the cock open so long as the gas is burning. Should the gas be extinguished by accident or other cause the fluid cools and the drum'head goes back to its original form, as shown in Fig. 5. This action leaves the catch-lever free to be actuated by the spring 0, which throws the lever back to its starting-point and closes the cock, thus preventing the escape of gas when the light is extinguished.

Having described myinvention, what I claim, and desire to secure by Letters Patent, is

1. A safety attachment for a gas-burner, consisting of an air-tight drum having a concaved head provided with lugs or projections d and d", in combination with the catchlever E, attached to and movable with the plug of the valve 0, the spring 6', and means connected with the flame of the burner for heating the fluid within the drum to throw out the head, substantially as set forth.

2. A removable safety attachment for a gasburner, consisting of a drum having a concaved head provided with the projections d and d, a tube, as (Z, running through the drum and secured to its walls, and a tube, as F,.secured to and communicating with its interior, in combination with a catch-lever, as E, provided with means for attaching it to the plug of the valve, and a spring, as E, provided with an aperture for slipping it over the gas-burner.

3. The combination, with a gas-burner and valve-plug, of a safety attachment for a gasburner, consisting of an air-tight drum located upon the gas-pipe, having a concaved head provided with lugs or projections d d, acatehlever, E, attached to and moving with the plug of the valve 0, a spring located upon the burner and connected with one arm of the lever E, so as to exert its tension to close the valve, and the tube F, one end of which communicates with the interior of the drum and the other located so as to receive the heat from the flame, substantially as set forth.

EUGENE R. IRUITT.

Wi tncsses:

EDGAR G. MILLER, Jr., C. It. GALLAGHER. 

